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Icom SM-20, Instructions

The TIANJIN BAILI ERTONG MACHINERY SM-20 is a high-performance machinery designed for efficient operations. To ensure seamless functioning, it comes with a comprehensive Operation Manual available for free download on our website. Get the most out of your product by accessing the manual at manualshive.com, delivering detailed instructions for optimum performance.

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Please note, the illustration of the bi-color LED in the QST drawn circuit above is

incorrect. It should be as shown below:

Revised Jan 23, 2016 VA3DDN

Kg

Kr

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Summary of Contents for SM-20

Page 1: ...270 Ω R5 100 Ω Kr Kg R4 4 7 kΩ R2 3 3 kΩ C1 C2 0 01 D1 1 2 3 Q1 BC547B Q2 BC547B 16 V 2 2 μF 8 V 5 V R5 0 red wire To Radio PTT yel wire com gnd blk wire 1N5819 Bi color red grn LED or two separate LEDs in parallel C1 capacitor 2 2 mF 16 V tantalum C2 capacitor 0 01 mF 50 V ceramic D1 Schottky diode 1N5819 LED1 see text bi color 3mm LED Jameco 94553 or Digikey 160 1058 ND Q1 Q2 NPN transistor BC54...

Page 2: ...ads and finished with larger shrink tubing over both wires If you opt for two separate LEDs bend the leads at right angles about 0 2 inches from the LED body as seen in Figure 2 Next po sition both LEDs with their leads pointing at each other in a soft jawed vise at the desired distance apart I used 0 75 inches Tack the leads together with a drop of solder then position and solder the color coded ...

Page 3: ...485 Quality Systems Regulatory Affairs in the areas of technical support for electronic components and materials environmental testing and instru ment calibration automotive electronics product development switch mode power supply de velopment medical electronics UL CSA and EU product safety testing and certification and EMI compliance Don developed programs for accelerated life testing methods su...

Page 4: ...ional Information Note Pin out outline of Q1 Q2 as shown on pcb matches 2N4401 2N3904 BC547B 2N2222 may require mounting 180 deg Please verify pin out of the transistors you have per manufacturer data sheet ...

Page 5: ...Please note the illustration of the bi color LED in the QST drawn circuit above is incorrect It should be as shown below Revised Jan 23 2016 VA3DDN Kg Kr ...

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